CN113480099A - In-situ circulating treatment process for landscape lake water - Google Patents
In-situ circulating treatment process for landscape lake water Download PDFInfo
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- CN113480099A CN113480099A CN202110828723.0A CN202110828723A CN113480099A CN 113480099 A CN113480099 A CN 113480099A CN 202110828723 A CN202110828723 A CN 202110828723A CN 113480099 A CN113480099 A CN 113480099A
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Classifications
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses an in-situ circulation treatment process for landscape lake water, and belongs to the technical field of landscape water circulation purification. The process consists of a surface runoff collecting tank, an ecological infiltration tank, an enhanced purification unit, a circulating power system and a landscape lake water main body water area. The surface runoff collecting tank is located at the lowest part of the terrain around the landscape lake and is communicated with the ecological infiltration tank, the ecological infiltration tank is located at the outermost circle of the landscape lake, the water inlet area of the landscape lake is provided with the reinforcing and purifying unit, and the circulating power system is located at the center of the water body area of the landscape lake. The sponge concrete is used as a building material of structures such as a ground runoff collecting tank, an ecological infiltration tank and the like, and provides good conditions for filtering and purifying lake water. The invention is suitable for various urban landscape lakes, inherits the design concept of green, ecological and environmental protection aiming at the characteristics and pollution conditions of urban landscape water bodies, realizes the in-situ circulation treatment of landscape lake water, improves the quality of the landscape lake water, and has the advantages of low cost, simple operation, sustainable development and the like.
Description
The technical field is as follows:
the invention relates to an in-situ circulation treatment process for landscape lake water, and belongs to the technical field of landscape water circulation purification.
Background art:
with the development of economy in China, the quality of life of people is continuously improved, the requirements on living and living environments are higher and higher, and more landscape lakes are additionally arranged in cities in order to meet the living needs of people. Because the urban landscape water body is mostly a closed slow-flow water body with poor fluidity, the urban landscape lake has the characteristics of small water area, small water environment capacity, easy pollution and the like, and lacks the self-purification function and ecological balance system of natural water body, the urban landscape lake is easy to become a storage body for rainwater and garbage. At present, landscape lake water mainly faces the following pollution factors: organic matters and nitrogen and phosphorus elements in the surface and soil brought by rainwater surface runoff; foreign organic matters and nitrogen and phosphorus elements brought by atmospheric dust fall; organic matters accumulated by dead biological communities derived from the lake and the like continuously; the sun exposure in high temperature in summer causes a great amount of blue algae outbreak. The continuous increase of the content of organic matters, nitrogen, phosphorus and other elements causes eutrophication of water bodies, generates phenomena of smelling, greening and the like, and seriously influences the visual effect of landscape lakes and the living environment of surrounding residents. At present, the landscape water body water treatment technology mainly comprises a physical method, a chemical method, a microbiological method, an ecological water system and the like. The physical method comprises the following steps: besides direct water diversion and replacement, forced circulation can also enhance the fluidity of the water system, and the flooding of algae can be inhibited by keeping the flow speed of the water system at 3cm/s, but higher energy consumption is required; secondly, adding a sterilizing algicide by a chemical method: under the irradiation of sunlight, the algae in the water of the landscape lake breed in a large quantity, which not only affects the beauty of the landscape lake, but also shields the sunlight, inhibits the photosynthesis of underwater plants to release oxygen, and causes the chemical change of pollutant substances in the water to deteriorate the water quality and emit foul smell; chemical algicide is added to effectively kill the algae in the early stage of landscape lake water treatment, but drug-resistant algae appear in the water for a long time, and the efficiency of the algicide is gradually reduced; and with the continuous addition of the algicide, the pollution to the environment is also continuously increased; ③ the microorganism method: the decomposition of pollutants in water can be accelerated by adding a proper amount of microorganisms, so that the water quality purification effect is realized; however, the propagation speed of the microorganisms is remarkable, the quantity of the microorganisms is difficult to control, the growth of the microorganisms is greatly influenced by the environment, and meanwhile, the decomposition products of the microorganisms cause the mass propagation of algae, thereby again causing the water quality to deteriorate; fourthly, ecological water system: the aquatic plants in the ecological water system can effectively inhibit the growth of algae and enhance the pollution self-cleaning capacity of the water body; however, the construction of the aquatic plant system is difficult and the establishment of ecological water is a long process. In conclusion, the application effects of the landscape water treatment technologies in practical application are not ideal enough, so that the development of a pollution treatment technology suitable for landscape water bodies has very important significance for improving the urban environment quality and reducing urban sewage. The invention designs an in-situ circulating treatment process for landscape lake water aiming at the characteristics and the pollution condition of the urban landscape lake water, effectively removes pollutants such as organic matters, nitrogen, phosphorus and the like in the lake water to purify the water on the premise of not damaging the original ecological system of the lake water, and realizes the circulating treatment of the landscape lake water.
The invention content is as follows:
aiming at the problems that the concentration of pollutants such as organic matters, nitrogen, phosphorus and the like in landscape lake water is high, and the eutrophication of water bodies and the black and odorous phenomena of the water bodies are easy to generate, the invention develops the in-situ circulating treatment process for the landscape lake water, which has the advantages of low operation cost and simple operation and can be continuously developed.
In order to solve the technical problems, the solution proposed by the invention is as follows: an in-situ circulating treatment process for landscape lake water, which is characterized in that: the process consists of a surface runoff collecting tank (1), an ecological infiltration tank (2), an enhanced purification unit (3), a circulating power system (4) and a landscape lake water main body water area (5); the reinforced purification unit (3) consists of a bottom aeration device (3-1) and a biological purification unit (3-2); the circulating power system (4) consists of a circulating power pump (4-1) and a circulating pipeline (4-2); an ecological box (5-1) and a multi-stage aeration device (5-2) are arranged in the main body water area (5) of the landscape lake water.
The basic process of the process comprises the following steps: firstly, collecting surface runoff to an ecological infiltration tank (2) communicated with the surface runoff collecting tank (1) through the surface runoff collecting tank for infiltration and primary treatment; secondly, the sewage enters an enhanced purification unit (3) and pollutants in the sewage are removed through a bottom aeration device (3-1) and a biological purification unit (3-2); thirdly, the water enters a main body water area (5) of the landscape lake water and is treated by an ecological box (5-1) and a multi-stage aeration device (5-2); and fourthly, finally, conveying the sewage to the ground runoff collecting tank (1) through a circulating power system (4) for circulating treatment.
In the in-situ circulating treatment process of the landscape lake water, the surface runoff collecting tank (1) consists of a canal body (1-1) and a cover plate (1-2); the canal body (1-1) is made of sponge concrete, and the permeability coefficient is 1-2 mm/s; the cover plate (1-2) is made of stainless steel materials, the specification and the size are 400mm multiplied by 500mm, and the thickness is 20 mm.
In the in-situ circulating treatment process of the landscape lake water, the ecological infiltration tank (2) is made of sponge concrete, and the permeability coefficient is 1-2 mm/s; the ecological infiltration tank (2) is provided with an intelligent dirt cleaning device (2-1), and the bottom of the ecological infiltration tank is provided with an impermeable geotextile (2-2).
In the in-situ circulating treatment process of the landscape lake water, a sponge concrete partition wall (3-3) is arranged between the enhanced purification unit (3) and the main body water area (5) of the landscape lake water; the reinforced purification unit (3) is set with hydraulic retention time of 1-2 days and surface load of 1.0-3.0 m3/(m2H); the biological purification unit (3-2) consists of an ecological floating bed (3-4) and biological fillers (3-5); the filling rate of the biological filler (3-5) in the biological purification unit (3-2) is 20% -40%; the ecological floating bed (3-4) floats on the water surface, the biological fillers (3-5) are vertically suspended below the ecological floating bed (3-4), and 1-2 biological fillers (3-4) are suspended below each biological floating bed (3-2); the frame of the ecological floating bed (3-4) is made of sponge concrete, is round and has the diameter of 50-100 cm; circular holes containing blocking nets are formed in the ecological floating beds (3-4), and water-suitable plants (3-6) are planted in the circular holes; the water-adaptation plants (3-6) are composed of one or more of calamus, iris and reed; the biological filler (3-5) is made of carbon fiber and is strip-shaped.
In the in-situ circulation treatment process of the landscape lake water, the circulation power system (4) consists of a circulation power pump (4-1) and a circulation pipeline (4-2), the circulation power pump (4-1) is installed at the central position of a main body water area (5) of the landscape lake water, and the circulation pipeline (4-2) is laid at the bottom of the landscape lake; the circulating power pump (4-1) conveys the landscape lake water to the ground runoff collecting tank (1) for circulating treatment through a circulating pipeline (4-2) every 12-48 hours.
In the in-situ circulating treatment process of the landscape lake water, the frame body of the ecological box (5-1) is made of sponge concrete, the permeability coefficient is 3-5 mm/s, the ecological box is cuboid, the length-width-height ratio is 1:0.6:1, and the length is 150-300 cm; the ecological boxes (5-1) are arranged at the bottom of the edge of the main body water area (5) of the landscape lake water, and 6-10 ecological boxes are arranged; the hydraulic retention time of the ecological box (5-1) is 1-2 days; the ecological box (5-1) contains algae, benthonic animals and immobilized multilayer composite flora materials (5-3); the immobilized multilayer composite flora material (5-3) mainly comprises an inner core, an outer-layer embedding substance and an embedding agent (5-4); the filling rate of the immobilized multilayer composite flora material (5-3) is 10% -30% of the total volume of the ecological box (5-1); the inner core is anaerobic ammonia oxidation granular sludge (5-5), and the grain diameter is 3-8 mm; the outer-layer embedded matter is denitrification granular sludge (5-6) and aerobic nitrification granular sludge (5-7), and the mass ratio of the denitrification granular sludge (5-6) to the aerobic nitrification granular sludge (5-7) is 1: 1; the embedding agent (5-4) is prepared from polyvinyl alcohol, sodium alginate and water according to the weight ratio of 6-12: 0.5-2: 100 mass ratio.
In the in-situ circulation treatment process of the landscape lake water, the multi-stage aeration device (5-2) is arranged at the bottom of the main body water area (5) of the landscape lake water, the laying interval of the aeration pipelines is 0.5-1 m, and the peripheral aeration rate of the landscape lake is 5-10 m3Min, dissolved oxygen in water is 2-3 mg/L, aeration rate in the center of landscape lake is 0.5-1 m3Min, and the dissolved oxygen in water is 0.2-0.5 mg/L. In the in-situ circulation treatment process of the landscape lake water, the porosity of the sponge concrete is more than 40%, wherein the volume of pores with the diameter of 0.4-2 mm accounts for more than 60%, and the maximum water holding rate exceeds 50%; the preparation raw materials and the weight fraction of the sponge concrete comprise 100-150 g mass parts of aggregate, 10-20 g mass parts of cement, 3-8 g mass parts of binder, 0.5-2 g mass parts of foaming agent, 0.2-1 g mass part of anti-cracking agent, 0.1-1 g mass part of microbial agent and 2-20 g mass parts of water; the aggregate is mainly one or more of zeolite, limestone, slag and gravel; the cement is one or more of magnesite material and silico-calcic material cement; the binder is one or more of epoxy resin adhesive, unsaturated polyester resin adhesive and polyurethane adhesive; the foaming agent is mainly a physical foaming agent comprising a compound foaming agent and a biosurfactant or a chemical foaming agent comprising two or more of hydrogen peroxide, calcium carbide and ammonium salt; the anti-cracking agent is one or more of polypropylene fiber, carbon fiber and oil palm fiber; the microbial agent mainly comprises bacillus, silicate bacteria, actinomycetes, ammonia oxidizing bacteria, sulfate reducing bacteria, nitrate reducing bacteria, acid producing bacillus and anaerobic ammonia oxidizing bacteria; the preparation steps of the sponge concrete mainly comprise aggregate screening and grading-primary mixingMixing and stirring, secondary mixing, aeration and stirring, tertiary mixing and stirring, casting molding and curing; the recycling steps of the sponge concrete mainly comprise mechanical crushing, ultrasonic stripping, aggregate sorting and regeneration, and excess material crushing and regeneration.
Compared with the prior art, the invention has the advantages that:
the invention carries out in-situ multi-stage treatment on the urban landscape lake water and surface runoff flowing into the landscape lake through the ecological infiltration tank, the enhanced purification unit and the landscape lake water main body water area respectively, and the water body purification effect is obviously improved. The water body is percolated and primarily treated in the ecological percolation tank, effective gas-water contact is generated and maintained by an aeration device at the bottom of the purification unit, a certain dissolved oxygen concentration in the water is kept under the condition that the biological oxidation action continuously consumes oxygen, the mass transfer condition of pollutants in a water treatment system is enhanced, the treatment effect is improved, the biological purification unit removes the pollutants in the water by utilizing the metabolic action of various microorganisms in the water, and finally, the pollutants in the landscape lake water are maintained at a lower level by a multi-stage aeration unit and an ecological box in a main body water area of the landscape lake water, so that the blue-green algae outbreak can be inhibited, the water quality of the lake water is remarkably improved, and the ecological restoration is realized; meanwhile, the circulating power system can convey the lake water in the main body water area of the landscape lake water to the ground runoff collecting tank in a circulating manner for circulating treatment.
Secondly, the water quality purification effect is good, and the effluent quality is stable and reliable; the invention combines ecology and manual technology, has high stability, strong controllability and wide adaptability, and can adopt rainwater, river water and the like as supplementary water sources; the invention has the advantages of no need of adding chemical agents, no secondary pollution, less sludge amount, no need of manual operation and nursing, stable operation of the system for a long time and maintenance and management cost saving.
Secondly, the porous characteristic of the sponge concrete adopted by the invention provides good conditions for filtering and purifying lake water, storing the lake water and absorbing runoff on the surrounding ground. Rainwater accumulated on the road surface is collected through the ground runoff collecting tank, so that the availability of local water resources can be improved, measures for purifying rainwater can be reduced, the investment and operation cost are reduced, and the pollution is reduced. Sponge concrete is as the building material of ground runoff collecting vat, ecological infiltration groove, partition wall, ecological bed and ecological case that floats, and not only the water permeability is strong, has played good filtering action simultaneously to microbial inoculum among the sponge concrete can tentatively get rid of the aquatic pollutant, and its porous structure is more convenient when abandonment concrete recycle, but reutilization, energy-concerving and environment-protective, economic high efficiency.
Thirdly, the ecological box adopted by the invention utilizes the immobilized microorganism technology to wrap the anaerobic ammonia oxidation granular sludge, the denitrification granular sludge and the aerobic nitrification granular sludge in the immobilized composite flora material. The anaerobic ammonium oxidation granular sludge is used as an inner core, and the denitrification granular sludge and the aerobic nitrification granular sludge are used as outer-layer embedded objects, so that the coordinated operation of aerobic nitrification reaction, anaerobic ammonium oxidation reaction and anaerobic denitrification reaction can be realized, and the effect of synchronously removing pollutants in water is achieved; the process for preparing the immobilized multi-layer composite flora material is simple and easy to control, and the obtained immobilized composite flora material has strong mechanical property and can be repeatedly used; meanwhile, the immobilized microorganism technology adopted by the invention ensures that the selected microorganisms are highly dense and maintain certain biological activity, is beneficial to the microorganisms to resist the influence of adverse environment, and has the advantages of low cost, high efficiency and the like.
In conclusion, the invention aims at the characteristics and pollution conditions of urban landscape lake water bodies, inherits the design concepts of green, ecology and environmental protection, realizes the in-situ circulation treatment of landscape lake water, improves the quality of landscape lake water, and has the advantages of low operation cost, simple operation, sustainable development and the like.
Description of the drawings:
FIG. 1 is a schematic view of an in-situ circulation treatment process for landscape lake water.
FIG. 2 is a schematic structural view of an in-situ circulation treatment process for landscape lake water.
FIG. 3 is a schematic structural diagram of an immobilized multi-layer composite flora material.
Illustration of the drawings:
the specific implementation mode is as follows:
the present invention will be described in detail below by way of specific examples.
Example 1
An in-situ circulating treatment process for landscape lake water comprises a surface runoff collecting tank (1), an ecological infiltration tank (2), an enhanced purification unit (3), a circulating power system (4) and a landscape lake water main body water area (5). The ground runoff collecting tank (1) is located at the lowest part of the terrain around the landscape lake and is communicated with the ecological infiltration tank (2), the ecological infiltration tank (2) is located at the outermost circle of the landscape lake, the water inlet area of the landscape lake is provided with the enhancement and purification unit (3), and the circulating power system (4) is located at the center of the water main body area (5) of the landscape lake.
The surface runoff collecting tank (1) consists of a channel body (1-1) and a cover plate (1-2); the canal body (1-1) is made of sponge concrete, and the permeability coefficient is 1 mm/s; the cover plate (1-2) is made of stainless steel materials, the specification and the size are 400mm multiplied by 500mm, and the thickness is 20 mm.
The ecological percolation tank (2) is made of sponge concrete, and the permeability coefficient is 1 mm/s; the ecological infiltration tank (2) is provided with an intelligent dirt cleaning device (2-1), and the bottom of the ecological infiltration tank is provided with an impermeable geotextile (2-2).
A sponge concrete partition wall (3-3) is arranged between the enhanced purification unit (3) and the landscape lake water main body water area (5), and the permeability coefficient is 2 mm/s; the reinforced purification unit (3) is set to have hydraulic retention time of 1.5 days and surface load of 2.0m3/(m2H); the biological purification unit (3-2) consists of an ecological floating bed (3-4) and biological fillers (3-5); the filling rate of the biological filler (3-5) in the biological purification unit (3-2) is 30%; the ecological floating beds (3-4) float on the water surface, the biological fillers (3-5) are vertically suspended below the ecological floating beds (3-4), and 1 biological filler (3-4) is suspended below each biological floating bed (3-2); the frame of the ecological floating bed (3-4) is made of sponge concrete, is round and has the length of 80 cm; the ecological floating bed (3-4) is internally provided with 3 circular holes with blocking nets and the radius of the holes is 5cm, and water-suitable plants are planted in the circular holes(3-6); the water-adaptation plants (3-6) are composed of calamus, iris and reed; the biological filler (3-5) is made of carbon fiber and is strip-shaped.
The circulating power system (4) consists of a circulating power pump (4-1) and a circulating pipeline (4-2); the circulating power pump (4-1) is arranged at the central position of the landscape lake water main body water area (5); the circulating pipeline (4-2) is laid at the bottom of the landscape lake; the circulating power pump (4-1) conveys the landscape lake water to the ground runoff collecting tank (1) through a circulating pipeline (4-2) at intervals of 36 hours for circulating treatment.
The frame body of the ecological box (5-1) is made of sponge concrete, the permeability coefficient is 3mm/s, the ecological box is cuboid, the length-width-height ratio is 1:0.6:1, and the length is 200 cm; the ecological boxes (5-1) are arranged at the bottom of the edge of the main body water area (5) of the landscape lake water, and the number of the ecological boxes is 8; the hydraulic retention time of the ecological box (5-1) is 1.5 days; the ecological box (5-1) is composed of algae, benthonic animals and immobilized multilayer composite flora materials (5-3); the filling rate of the immobilized multilayer composite flora material (5-3) is 20% of the total volume of the ecological box (5-1); the multi-stage aeration device (5-2) is arranged at the bottom of the main body water area (5) of the landscape lake, the laying distance of the aeration pipelines is 0.8m, and the peripheral aeration rate of the landscape lake is 8m3Min, dissolved oxygen in water is 2.5mg/L, aeration rate of landscape lake center is 0.8m3Min, dissolved oxygen in water is 0.3 mg/L.
The immobilized multilayer composite flora material (5-3) mainly comprises an inner core, an outer-layer embedding substance and an embedding agent (5-4); the inner core is anaerobic ammonia oxidation granular sludge (5-5) with the grain diameter of 5 mm; the outer layer embedding substance is composed of denitrification granular sludge (5-6) and aerobic nitrification granular sludge (5-7), wherein the denitrification granular sludge (5-6): the mass ratio of the aerobic nitrification granular sludge (5-7) is 1: 1; the embedding agent (5-4) is prepared from polyvinyl alcohol, sodium alginate and water according to the weight ratio of 10: 2: 100 mass ratio.
The preparation raw materials and the weight fraction of the sponge concrete comprise 120g mass parts of aggregate, 15g mass parts of cement, 5g mass parts of binder, 0.5g mass part of foaming agent, 0.5g mass part of anti-cracking agent, 0.5g mass part of microbial agent and 10g mass part of water; the aggregate is mainly zeolite, limestone, slag and gravel; the cement is silico-calcium material cement; the binder is an epoxy resin adhesive and an unsaturated polyester resin adhesive; the foaming agent is mainly a compound foaming agent in a physical foaming agent; the anti-cracking agent is polypropylene fiber and carbon fiber; the microbial agent mainly comprises bacillus, silicate bacteria, actinomycetes, ammonia oxidizing bacteria, sulfate reducing bacteria, nitrate reducing bacteria, acid producing bacillus and anaerobic ammonia oxidizing bacteria; the preparation steps of the sponge concrete mainly comprise aggregate screening and grading, primary mixing and stirring, secondary mixing, aeration and stirring, tertiary mixing and stirring, casting molding and curing; the recycling step of the sponge concrete mainly comprises mechanical crushing, ultrasonic stripping, aggregate sorting and regeneration, and excess material crushing and regeneration; the porosity of the sponge concrete is more than 40%, wherein the volume of the pores with the diameter of 0.4-2 mm accounts for more than 60%, and the maximum water holding rate exceeds 50%.
Example 2
Example 2 differs from example 1 in that:
the surface runoff collecting tank (1) consists of a channel body (1-1), a cover plate (1-2) and a filter screen (1-3); the filter screen (1-3) is made of stainless steel materials, the specification size is 400mm multiplied by 300mm, the thickness is 10mm, the filter screen (1-3) is installed at the interface of the ground runoff collecting tank (1) and the ecological infiltration tank (2), and the filter screen is used for intercepting large-diameter stones or gravel impurities and preliminarily reducing the turbidity of ground runoff.
Example 3
Example 3 differs from example 1 in that:
the preparation raw materials and the weight fraction of the sponge concrete comprise 120g mass parts of aggregate, 15g mass parts of cement, 5g mass parts of binder, 0.5g mass part of foaming agent, 1g mass part of anti-cracking agent, 1g mass part of microbial agent and 10g mass part of water; the quality of the anti-cracking agent and the microbial agent is increased from 0.5g to 1 g; the anti-cracking agent has the advantages that the strength of the sponge concrete can be improved by increasing the quality, and the service life of the sponge concrete is prolonged; the microbial agent with increased quality can accelerate water body treatment efficiency, effectively reduce indexes such as SS, ammonia nitrogen and the like in water, and has more obvious effects of deodorization and algae breeding inhibition.
The embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the particular embodiments described above, in which structures and processes not described in detail are practiced using conventional means in the art; the present invention is not limited to the specific embodiments, and those skilled in the art can make modifications, substitutions or alterations to the embodiments without any inventive contribution as required after reading the present specification, as long as they are protected by the patent laws within the scope of the present invention.
Claims (9)
1. The in-situ circulating treatment process for landscape lake water is characterized by comprising a ground runoff collecting tank (1), an ecological infiltration tank (2), an enhanced purification unit (3), a circulating power system (4) and a landscape lake water main body water area (5); the reinforced purification unit (3) consists of a bottom aeration device (3-1) and a biological purification unit (3-2); the circulating power system (4) consists of a circulating power pump (4-1) and a circulating pipeline (4-2); an ecological box (5-1) and a multi-stage aeration device (5-2) are arranged in the landscape lake water body water area (5); the basic flow of the process is as follows: firstly, collecting surface runoff to an ecological infiltration tank (2) communicated with the surface runoff collecting tank (1) through the surface runoff collecting tank for infiltration and primary treatment; secondly, the sewage enters an enhanced purification unit (3) and is degraded by a bottom aeration device (3-1) and a biological purification unit (3-2); thirdly, the water enters a main body water area (5) of the landscape lake water and is treated by an ecological box (5-1) and a multi-stage aeration device (5-2); and fourthly, finally, conveying the sewage to the ground runoff collecting tank (1) through a circulating power system (4) for circulating treatment.
2. The in-situ circulation treatment process for landscape lake water according to claim 1, characterized in that: the surface runoff collecting tank (1) consists of a channel body (1-1) and a cover plate (1-2); the canal body is made of sponge concrete, and the permeability coefficient is 1-2 mm/s; the cover plate (1-2) is made of stainless steel materials.
3. The in-situ circulation treatment process for landscape lake water according to claim 1, characterized in that: the ecological percolation tank (2) is made of sponge concrete, and the permeability coefficient is 1-2 mm/s; the ecological infiltration tank (2) is provided with an intelligent dirt cleaning device (2-1), and the bottom of the ecological infiltration tank is provided with an impermeable geotextile (2-2).
4. The in-situ circulation treatment process for landscape lake water according to claim 1, characterized in that: the above-mentioned
A sponge concrete partition wall (3-3) is arranged between the enhanced purification unit (3) and the landscape lake water main body water area (5); the reinforced purification unit (3) is set with hydraulic retention time of 1-2 days and surface load of 1.0-3.0 m3/(m2*h)。
5. The in-situ circulation treatment process for landscape lake water according to claim 1, characterized in that: the biological purification unit (3-2) consists of an ecological floating bed (3-4) and biological fillers (3-5); the filling rate of the biological filler (3-5) in the biological purification unit (3-2) is 20% -40%; the ecological floating bed (3-4) floats on the water surface, the biological fillers (3-5) are vertically suspended below the ecological floating bed (3-4), and 1-2 biological fillers (3-4) are suspended below each biological floating bed (3-2); the frame of the ecological floating bed (3-4) is made of sponge concrete, is round and has the diameter of 50-100 cm; circular holes containing blocking nets are formed in the ecological floating beds (3-4), and water-suitable plants (3-6) are planted in the circular holes; the water-adaptation plants (3-6) are composed of one or more of calamus, iris and reed; the biological filler (3-5) is made of carbon fiber and is strip-shaped.
6. The in-situ circulation treatment process for landscape lake water according to claim 1, characterized in that: the circulating power system (4) consists of a circulating power pump (4-1) and a circulating pipeline (4-2); the circulating power pump (4-1) is arranged at the central position of the landscape lake water main body water area (5); the circulating pipeline (4-2) is laid at the bottom of the landscape lake; the circulating power pump (4-1) conveys the landscape lake water to the ground runoff collecting tank (1) for circulating treatment through the circulating pipeline (4-2) every 12-48 hours.
7. The in-situ circulation treatment process for landscape lake water according to claim 1, characterized in that: the frame body of the ecological box (5-1) is made of sponge concrete, the permeability coefficient is 3-5 mm/s, the ecological box is cuboid, the length-width-height ratio is 1:0.6:1, and the length is 150-300 cm; the ecological boxes (5-1) are arranged at the bottom of the edge of the main body water area (5) of the landscape lake water, and 6-10 ecological boxes are arranged; the hydraulic retention time of the ecological box (5-1) is 1-2 days; the ecological box (5-1) contains algae, benthonic animals and immobilized multilayer composite flora materials (5-3); the immobilized multilayer composite flora material (5-3) mainly comprises an inner core, an outer-layer embedding substance and an embedding agent (5-4); the filling rate of the immobilized multilayer composite flora material (5-3) is 10% -30% of the total volume of the ecological box (5-1); the inner core is anaerobic ammonia oxidation granular sludge (5-5), and the grain diameter is 3-8 mm; the outer-layer embedded matter is denitrification granular sludge (5-6) and aerobic nitrification granular sludge (5-7), and the mass ratio of the denitrification granular sludge (5-6) to the aerobic nitrification granular sludge (5-7) is 1: 1; the embedding agent (5-4) is prepared from polyvinyl alcohol, sodium alginate and water according to the weight ratio of 6-12: 0.5-2: 100 mass ratio.
8. The in-situ circulation treatment process for landscape lake water according to claim 1, characterized in that: the multi-stage aeration device (5-2) is arranged at the bottom of the main body water area (5) of the landscape lake water, the laying distance of the aeration pipelines is 0.5-1 m, and the peripheral aeration quantity of the landscape lake is 5-10 m3Min, dissolved oxygen in water is 2-3 mg/L, aeration rate in the center of landscape lake is 0.5-1 m3Min, and the dissolved oxygen in water is 0.2-0.5 mg/L.
9. The in-situ circulation treatment process for landscape lake water according to claims 1 and 2, characterized in that: the porosity of the sponge concrete is more than 40%, wherein the volume of the pores with the diameter of 0.4-2 mm accounts for more than 60%, and the maximum water holding rate is more than 50%; the preparation raw materials and the weight fraction of the sponge concrete comprise 100-150 g mass parts of aggregate, 10-20 g mass parts of cement, 3-8 g mass parts of binder, 0.5-2 g mass parts of foaming agent, 0.2-1 g mass part of anti-cracking agent, 0.1-1 g mass part of microbial agent and 2-20 g mass parts of water; the aggregate is mainly one or more of zeolite, limestone, slag and gravel; the cement is one or more of magnesite material and silico-calcic material cement; the binder is one or more of epoxy resin adhesive, unsaturated polyester resin adhesive and polyurethane adhesive; the foaming agent is mainly a physical foaming agent comprising a compound foaming agent and a biosurfactant or a chemical foaming agent comprising two or more of hydrogen peroxide, calcium carbide and ammonium salt; the anti-cracking agent is one or more of polypropylene fiber, carbon fiber and oil palm fiber; the microbial agent mainly comprises bacillus, silicate bacteria, actinomycetes, ammonia oxidizing bacteria, sulfate reducing bacteria, nitrate reducing bacteria, acid producing bacillus and anaerobic ammonia oxidizing bacteria; the preparation steps of the sponge concrete mainly comprise aggregate screening and grading, primary mixing and stirring, secondary mixing, aeration and stirring, tertiary mixing and stirring, casting molding and curing; the recycling steps of the sponge concrete mainly comprise mechanical crushing, ultrasonic stripping, aggregate sorting and regeneration, and excess material crushing and regeneration.
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| 吕晶晶;窦艳艳;张列宇;席北斗;于水利;侯立安;: "改良型土壤渗滤系统处理生活污水脱氮除磷", 环境工程, no. 03, pages 43 - 48 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113501580A (en) * | 2021-07-22 | 2021-10-15 | 长沙理工大学 | Landscape lake water in-situ circulating treatment system |
| CN113501580B (en) * | 2021-07-22 | 2023-11-24 | 长沙理工大学 | In-situ circulation treatment system for landscape lake water |
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| Publication number | Publication date |
|---|---|
| CN113480099B (en) | 2024-01-05 |
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